Motor control for selective-systems



July. 27, 1926. 1,594,214

A. H. REIBER ET AL MOTOR common F'OR SELECTI'VE SYSTEMS Filed March 24,1924 45 sion of a special si Patented July 27, 1926.

' UNITED .STATES PATENT OFFICE.

ALBERT H. REIBER, OF QUEENS, AND. CARL ERIC NELSON, F. BROOKLYN, NEWYORK, -ASSIGNORS, BY MESNE ASSIGNMENTS, TO MORKRUM-KLEINSCHMIDT CORPORA-TION, OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

' MOTOR CONTROL FOR SELECTIVE*SYSTEMS.

Application filed March 24, 1924 Serial No. 701,522.

cable to printers of multiple magnet type controlled by rotarydistributor switches and other types of telegraph and selectivemechanisms. 1 In systems where a number of printer circuits incommunication with outlying stations terminate in a room, if bellsignals for attention at a printer are received, it is difficult for theoperator to pick out the circuit which requires attention. Frequentlythe beilgsignals are sent to attract attention to matters that may beattended to at the convenience of the operator while other mattersrequire immediate. attention. A system of signalling auxiliary to theusual bells to indicate the circuits which are signalling, and todifferentiate between more important and less important calls is highlydesirable" and adds to the efficiency of operation of the system.

The objects of theinvention are to provide novel methods of' startingand stopping motors by means controlled through the receiving selectorsat each station to provide a motor control operable under the control ofthe selector mechanism, or under the combined'control of the printershift mechanism and the selector mechanism; to provide a 40 controloperable to stop themotors at each station in response, to selectivecombinations sent out from .any station and to start the same inresponse to the commencementof transmission or in response to thetransmisal; to provide a main and an auxiliary ca 1 system, and suchother objects as will appear hereinafter in the detailed description ofof the invention, of which- Figure 1 is afragmental plan viewparpreferred embodiments signal, and to be released tially in diagramof,the mechanism applied to a single magnet selector.

Figure 2 is a fragmental front View of the mechanism sLown in Figure 15;Figure 3 is a fragmental plan view show-' ingihe mechanism in actuatedcondition.

The mechanism in the form disclosed is in the nature ofan attachmenttoibe operated by the single magnet. selector disclosed in co-pendingapplication, Serial Number 649,562, filed July 5, 1923. So much of thisselector only and the printer parts are here shown and described ingeneral, as will enable an understanding of the present invention to behad.

The parts of the selector and printer with which the parts of thepresent invention coact have been given the same reference characters asin the c'opending case. The selector magnet 8 is preferably normallyenergized when no selections, are being made. Each signal combinationcomprises a selec-' tor start condition, a code combination of selectingconditions and a selector stop con dition Magnet 8 is deenergized inresponse '15 to a start condition and this permits endwise movement ofcam shaft 15. Due to this endwise movement, shaft 15 starts intorotation and thereafter the code combinations are received and energize8 in accordance with the received combinations to selectively positionfingers 37 to 41. The cam shaft then trips a mechanism to permit notchedselector bars 59 to 63 to assume positions in accordance with theselectively positioned fingers 37 to 41, and at the same time to setinto operation the printing bail which will cause movementof theselectedactuating bar 108 into the aligned selector bar slots to causean operating movement of the selected bar. While the selection set up onbars 59 to 63 is being carried out-,restoration of fingers 37 to 4:1and-the resetting thereof 1n accordance with asucceedingselectivecombination may proceed. Carriage shift mechanism, includingarms 246, shaft 247 and shaft arm 265 are arranged to be operated andlocked in shifted condition, by an actu-- 'ating bar. 108 in response toa special shift I by an unshift bar ram 108 by a special unshift signal,all as described in the copending case.

To distinguish the parts of the invention that are new, referencecharacters com- Inencing at three hundred will be used. Se cured to baseplate 1 is a support 300 in which a spindle 301 is rotatably supported.Spindle 301 has formed integrally therewith a bearing collar 302 andrigidly se cured thereto is an actuating arm 303. A spring 304 securedto arm 303 and to support 300 normally forces the arm 303 against theselector support as shown in Fig. 1, with the end thereof directlyin thepath of actuating movement of one of the bars 108. Rigidly secured tothe lower end of spindle 301 is an arm 305 to the outer end of which amember 306 is pivotally secured at 307, in a manner to be supportedthereby. Member 306 extends across the front of the selector and isguided for movement b a pin or screw 308 which extends througli a slot309. A latch extension 310 is formed on the end of member 306, and anotch 311 is cut therein to permit the free movement of resilient latchmember 312 rigidly secured to armature 9 by means of screws 313 so asnot to interfere with the operation ofthe armature. At the other end 306is bent at right angles and an adjustable contact operating screw 314 isscrewed therein and secured by means of a lock nut 316. A spring contactmember 317 is provided carrying contact 318 and an operating block 319arranged in the path of movementof 315. Contact 318 is arranged tonormally engage a contact 320 secured on a member 321. Members 317 and321 are insulated from each other and from the mechanism by means ofinsulating members 322, and are secured to support 300 by screws 323.Suitably secured to the printer and properly insulated from each otherare contact members 324 and 325, carrying contacts 326 and 327. Ablock.328 is secured to 327 and arranged in the path of arm 265 so thatwhen the printer mechanism is locked in shifted position contacts 326and 327 will be opened by member 265.

In practice, the printer motor 329 has the supply circuit connected inseries by means of conductors 330, and 331 through contacts 318 and 320,and contacts 326 and 327 are connected by means of conductors 332 and333 in shunt with respect to the circuit through contacts 320 and 318.When either set of contacts is closed the motor will run,

and both sets must be opened to stop the motor. If desired the shiftcontrolled circuit through contacts 326 may be eliminated in which eventthe motor will be stopped with the pr nter in the lower case.

An auxiliary signal lamp 334 is' connect- A ed by conductor 335 to thenegative pole of the electrical supply and to contact spring tatinOperation. When the contacts 326 and 327 are eliminated, and with theprinter arranged to have the magnet energized in rest position as inclosed circuit operation, the end of arm 303 is disposed in front of anactuating bar 108 which may be the blank signal bell operating bar or a.special motor stop bar. Assuming the contacts 318 and 320 to be closedand the motor running, a'signal is sent to actuate the special bar 108.The combination is received on the selector mechanism and bars 59 to 63are set in accordance therewith. The printing mechanism then operates topermit the special bar 108 to drop into the aligned slots and when inthe slots the end of this bar will be lowvered and as the bail movesforward, the

bar 108 will engage arm 303 and shift it together with spindle 301, arm305 and bar 326 against the tension of spring 304 as shown in Fig. 3.This moves end 310 to the right in Fig. 3. As the motor stop signal willbe sent only when the transmission is completed, after the signal is setup on the selector fingers and the printing mechanism is tripped by thecam shaft, magnet 8 will be energized. The movement of member 310 inresponse to the actuation of arm 303 will accordingly force member 312outward and member 312 will then move into the position shown in Fig. 3and will lock member 326 to the right in which position contacts 318 and320 will be held open and the source of power supply to the motor willbe cut off. In this manner the motor will come to rest. When the ,lineis momentarily opened or a start condition of any signal is sent, magnet8 will be de-energized and spring 12 will throw armature "9.with latchmember 312 outward, releasing member 310 and permitting the parts toassume the position shown in Fig. 1 with contacts 318 and 320. Owing tothe extreme lightness of roselector parts, the relatively large size andt e starting characteristics of the motor the parts will come, up tospeed with suiii cient rapidity to receive the selective impulses of thefirst transmitted signal properly on the selector. As there are no shiftcontrolled contacts in this form, transmission of any signal will startoperation. If the blank signal bell operating bar 'is utiring and thecontacts will open each time a which event this will also servetorestore the printer station,

to restore bar 108 and permit closing of con-' tacts 318 and 320 in thiscase and ringing of the bell will continue. For closed circuit workingusing current and no current intervals a line interruption will ring thebell continuously and the motor will not.

stop.

If it is desired to utilize any other actuating bar 108 rather than thebell bar to stop themotor, or if it is desired to ring the bellsuccessively b holding the line open without opening t e motor supplycircuit and still use the bell bar to control the mo,- tor stop, theshift controlled contacts 326 and 327 may be added in shunt to thecontacts 318 and 320 in such position that they are held open by theprinter mechanism in the upper case or figures position and are closedwhen the printer mechanism is in the lower or letters case. If the bar108 which 'actuates 'arm 303 is selected with the printer in lower caseposition, the contacts 318 and- 320 will be opened, but the motor supplycircuit will be cbsed through contacts 326 and 327, and the usualfunction only will be performed by the bar 108. When however, the shiftcombination precedes this' signal, both sets of'contacts will be openand the motor will stop. After the motor is stopped in this manner, amomentary interru tion of start the motor, and the bell will continue toring while the line is interrupted as above set forth. If the bellsignal is sent from a keyboard member 306 will be latched to the right,as shown in Fig. 2 until it is released by the de-energization of magnet8. An unshift -or letters case signal, must be sent after the motor isstopped'to restore the printer to the letters case, in which positioncontacts 326* and 327 will again be closed. If desired the motor may bestarted the transmission of the letters signal, in

to the letters case. I The'operation of the auxiliary signalling systemis as follows: If an operatorv wishes to ring the bell'of his receiverat a remote to indicate that matter is to be transmitted which does notrequire, immediate attention, he depresses his bell key the requirednumber of times to indicate a message-and follows the bell si a1 bydepressing his letters key imme lately. The result isthat the bell ringsat the receiver and at the same time contacts 338 and- 339 are closedand flash the lamp 334 for each mg the line will de-energize 8 and ofsaid selectab nal. The letters signal following the bell signalsreleases member 306, permits contacts 338 and 339 to open andextinguishes the lam The flash of the-lamp and ringing of the bellindicate the circuit and the nature of the message being received. Ifimmediate attention is desired the bell signals are not followed byanotlfer signal and accordingly the contacts 338 and 339 will be lockedin closed position and lamp 334 will remain lighted at the end of thesignal and until the required attention is given. ing of the lampfollowed by a prolonged lighting thereof indicates the circuit andmatters requiring immediate attention, while the flashing of the lamponly, indicates the circuit, and that immediate attention is not reuired.

he stop mechanisms may obviously be applied for open circuit workingwith magnet 8 normally de-energized by reversing the position of member310 so that contacts 318 and 320 will be locked'open with the magnet 8de-energized and so that these contacts will be released and permittedto close when the magnet is energized. Otherwise the operations will bethe same as above described.

Having .described only. the preferred embodiments of the invention, manymodifications of the. mechanism and methods of applying the same willsuggest themselves to those skilled in the art, all within the scope ofthe appended claims. Accordingl .What is desired to be secured byLetters T and claimed as new is i I 1. In a selective system; a magnet;a selecting mechanism controlled by said magnet; a motor supplyingoperating energy to said selecting mechanism; and means controlled bysaid magnet for controlling the supply-hot energyto said motor.

atente combination asset forth in claim 1 in which said selectingmechanism comprises a pluralit of selectable members, one e membersbeing arranged to'actuate said motor control means.

3. In a selecting system a magnet; a se lecting mechanism comprising aplurality I of selectable members; solely and entirely mechanical meanscontrolled by said mag-- net and controlling said selectable members; amotor supplying actuating energy to said selecting mechanism; and meanscontrolled by one of said selectable-members for con.- trolling 4. Incombination, a selecting mechanism comprisinga plurahty ofselectableactuat-' ing bars, a drive motor for said selecting mechanism, andcontrol means for said motor operated by one of said 5. The combinationas set forth'in claim 4 in which said selecting mechanism compisses asingle-control magnet for control-- 'g said selectable actuating bars.

actuating bars.

the. energy supply .to said motor.'

by the magnet comprises means for locking the contacts in operatedposition.

9. In a printing telegraph system, a selecting mechanism comprising aplurality of notched selector bars movable in combination to selectivelyalign the notches contained therein; a motor; a supply circuit Em saidmotor; contacts in said supply circuit; operating means controlling saidcontacts comprising a bar movable into a set of said aligned notchescontrolled by selector mechanism to open said contacts; and additionalmeans for controlling said contact operating means. 7

10. The combination as setforth in claim 9 in which said additionalmeans comprises means for holding said contacts open to stop the motor,and for permitting said contacts to close to start the motor.

11. A printing telegraph receiver comprising a selecting mechanismresponsive to received combinations of electrical conditions to offsetprinting, a bell, selectable operating means for said bell controlled bysaid selecting mechanism, a motor, and control means for said motoroperated by said bell operating means.

12. In a printing telegraph receiver comprising a single magnetselecting mechanism and a shift mechanism, a motor, and means forstopping said motor under the combined control of .said. selecting andsaid shift mechanisms. g a

13. The combination as set forth in claim 12 together with means forstarting said natures.

motor under the control of said selectin mechanism, independently ofsaid shitt auxiliary signals to indicate the circuit re quiring theaction.

16. The method as set forth in claim 15 in which the auxiliary signalsare utilized to indicate whether the requirement for action isimmediate.

17. In a printing telegraph system, comprising a selecting mechanism anda shift mechanism, a signal, means for energizing said signal inunactuated position of said shift mechanism, and means for preventingenergization of said si nal in actuated position of said shift mecanism.

18. In a printing telegraph system comprising a. plurality oftransmitters; a receiving station comprising a plurality of printingtelegraph receivers responsive to 19. The combination as set forth inclaim 18 in which said main signalling means comprises a bell;.andsaid'auxiliary signalling means comprises a lamp. j

20. The combination as set forth in claim 19 together with means foroperatingv said auxillary signalling -means to 7 indicate Whether therequirement for action is immediate. v

In testimony whereof we aifix bur sig- ALBERT. H. nnrenn. CARL ERICNELSON.

at said transmitters;v main signaling means;

